The requirements of the fourth young master, no one dared to say anything, the strict hierarchical concept of feudal society was like a deep trench, straddling in front of them, and a few people cooperated a little and began to do it. Pen ~ fun ~ pavilion www.biquge.info

The yellow sand is in the river, before the strong man was instructed to dig, this digging sand is very simple, for the shallow riverside, just go down to dig it, the small river around Miaojiazhuang, the water depth is less than a foot, the river is just not over the foot and neck, for the man who often works in the paddy field, the simple can not be simpler.

All the sand dug out of the river needs to be washed, if it is the center of the river, it is better to say, the clear water of the river can wash the sand, there is a lot of dirt and mud on the riverside, if you don't wash it, the sand is useless.

One or two hundred pounds of sand, dozens of pounds of lime, and large buckets of water, these were combined, and several masons began to cement mortar.

This cement mortar, except for more yellow sand, the others are similar to the yellow mud paddle, and when it is with, it feels obviously viscous, and enough water is mixed with these things, and finally formed, and a lot of it comes out.

A master craftsman picks up a piece with a brick knife, and then puts it on the green brick, and several people cooperate with each other to start, a total of 100 bricks, 7 people, maybe not even a tea time, it is completed.

Sun Ji has always followed Zhao Xin, and after arriving at the big house, he was also curious about the effect of this powder, and everyone was stunned when he saw that it was a building material, and even thought that it was a kind of food before, and he was slightly disgusted, after all, it is equivalent to a yellow mud paddle, isn't eating it equivalent to eating a yellow mud paddle?

Why develop this, this makes everyone can't figure it out, the advantages of building materials are very useful, if they are expensive, they can't be sold, if they are cheap, they can't make money, it seems that the same trouble as the foaming agent before the production requires a lot of fierce calcination, in this case, even if it is only half of the foaming agent, the price of such things will be very high.

Yellow mud paddle, glutinous rice paddle, grass mud, these are building materials, glutinous rice pulp is the most expensive, but also used in the construction of the city wall, this powder can also exceed glutinous rice pulp, even if it is glutinous rice pulp, the price is not high, the price of foaming agent is a pound of 1 money, this price, can almost be called sky-high, but, in every steamed bun is not used much, this powder is a building material, it seems that the amount of use is a lot, really a pound is so expensive, who can afford it.

Zhao Xin didn't know that his actions made Sun Ji and others misunderstand, the price of soda ash was slightly more expensive, because during the experiment, his raw material was miscanthus salt, which is a relatively valuable thing, and the price was not low, but the most important thing was that he added high profits, in fact, a pound was only a few pennies, and he had hundreds of times more profits.

Even if it is soda ash, if Zhao Xin comes up with the cost price, it will be cheap and unbelievable, let alone cement, even in the Northern Song Dynasty, the price of cement is lower than soda ash, and it is much lower.

The main raw materials of cement, just clay, lime, these are the simplest, as long as you pay labor, dig on the ground, in the Northern Song Dynasty, the cost is almost negligible, and in the future, charcoal can also be replaced with coke, the cost is lower, and the heat control is better, so, among the lit cards, the price of cement, only a few tenths of soda ash.

Soda ash is about seven or eight hundred wen a load, but the price of cement is 35 wen a load, a difference of one-twentieth, the speed of production, is also fast, in the card system, the embodiment is not a unit of quintal, but a tonnage unit, the manifestation time is slightly longer than 12 minutes a ton.

Zhao Xin is looking for these craftsmen, on the one hand, to reduce his own pressure, and on the other hand, he is also making preparations in this regard.

Cement is different from soda ash, the positioning is different, so that the amount of use is completely different, even if it is just to strengthen the city defense of Miaojiazhuang, the amount of use is quite amazing, if it is still the amount of soda ash produced before, it is definitely not enough.

The moment the card system was lit up, this made Zhao Xin's worry disappear, I thought it was about the same as soda ash, 10 minutes a load, only a few tons a day, what can a few tons of cement do, strengthen the mansion, it is impossible to comb the entire Miaojiazhuang, although the mansion will become strong after processing, but it is too small to resist the attack of the forbidden army.

Now, 12 minutes a ton, what concept does it represent, 120 tons a day, compared to the 10 million tons in later generations, or even tens of millions of tons of cement plants, it is still heaven and earth, but it is enough for Miaojiazhuang.

Put half of the productivity of the card system, put on the cement, a month's time, can produce 1800 tons of cement, according to the most common building materials algorithm, 10 square high-rise buildings, will use 90 kilograms of cement to calculate, can build 200,000 square meters of high-rise buildings, equal to two acres of land area (1300 square meters), erect a 50-55 meters high (about 16 floors) building, which is completely the standard of large fortresses.

As for the price, a ton is only 700 Wen, this is still the price of small-scale production, once the cement production is on the track, there will be a significant reduction, low price, so that Zhao Xin is very satisfied, 60 tons a day, but only dozens of runs, compared with his previous estimate of hundreds of runs, I don't know how much, you can completely ignore the problem of quantity, on the premise of showing soda ash and other things every day, make every effort to show cement.

It is impossible for the card system to give cement, because the manifestation of soda ash every day is a large amount, and in the future, it is necessary to prepare a full set of forbidden army equipment for regimental training and prepare for the next war, but even so, they add up to less than half, 60 tons a day, which is enough.

Cement, in the era of industrial mass production, was originally a very cheap building material, and its unique properties made him a leader in military and civilian use.

Seeing that it was a building material, Sun Ji and the others did not have much interest, and took the initiative to leave, a tea time, it was enough for the mason to build the cement pier, when using it, they found that it was a little different from the yellow mud paddle, the adhesion and fixity of the cement slurry were quite good, and there was no need to deliberately put the position right, as long as you paid a little attention, don't be too biased, and the speed was even faster than before.

It's just that the price of this cement is about the same as the yellow mud paddle, perhaps, it can still be used, at least their labor force is a lot lighter, but no one has taken it to heart, how can the things that the noble young master get out of are cheap, maybe, this thing is more expensive than glutinous rice milk, it is just a rich man's toy.

Whether it is the mason or Sun Ji, they all see this cement as a toy, Zhao Xin's interest, especially Sun Ji, is protecting Zhao Xin's side, but seeing Zhao Xin's change like magic, changing everything back and forth, he doesn't know, it is Zhao Xin doing chemical experiments.

But they didn't think about the glory of cement, and they didn't realize that under their noses, a terrible military artifact appeared.

This is not an expensive aristocratic toy, but it is used by the common people, and it is a terrible creation that is brilliant in military terms.

The price of cement is really not expensive, perhaps, a little more expensive than the yellow mud paddle, but the expensive is limited, the yellow mud paddle is basically, are the cost of labor and a small part of the lime, cement at most added to the cost of cement, but also only accounted for one-eighth of it, and even because the amount of lime added is small, and part of the cost is reduced.

As for the sand, most of the rivers in the north are sandy, and these yellow sand flows in white, piled up high on the riverbed, dug out and used, the difficulty is very small, especially in some places with small water volume, compared to digging yellow mud in the mud, it is much easier.

Calculated in this way, the cost of cement mortar is really not high, far inferior to glutinous rice pulp, but the effect is on it, and the glutinous rice pulp is completely exploded.

In Miaojiazhuang, under the leadership of two potters who did not make a vessel, and Zhao Xin, a child, during the reign of Renzong of the Northern Song Dynasty, one of the most important military inventions of the Northern Song Dynasty was born, and its influence not only affected the national fortunes of the Northern Song Dynasty, but even had a far-reaching impact on all countries during the entire Northern Song Dynasty.

Cement, from this moment, changed the fate of the Northern Song Dynasty, itself the Northern Song Dynasty's defense capability is strong, cement and this defense capability on the bricks, the most important thing is that his price is cheap, large production, the combination of the two, suddenly burst out of the terrible power, chain fortress, key encirclement and oppression began to appear, Fan Zhongyan's castle theory, with an important realistic support, on the frontal battlefield, can give full play to the advantages of the Northern Song Dynasty, with the help of the fortress layer by layer.

Suddenly, the Western Xia first began to cry and call their mother, they found that the Song Dynasty, which was like an iron wall, made them forceful, and the fortresses all over the mountains were almost the same as their Shenglong Mansion, or even stronger, in front of the copper wall and iron wall, the cavalry they were proud of were so powerless, even if they were iron harriers, they also died in this fortress.

The dense fortresses, which they are proud of are retreating into advance, pulling the big battle line, and attacking the strategy of logistics and food cut-off, have completely come to naught, and the logistics force of transporting grain from one fortress to another is no more than 20 miles.

That's a hedgehog, the logistics of the Northern Song Dynasty, even under the premise of basic protection, endless transportation, small groups of cavalry are easy to be surrounded and killed, the army can't get in at all under the premise of not pulling out nails, and the situation is beginning to be precarious.

It has always existed in the Northern Song Dynasty, and even in the Southern Song Dynasty, resisting the attacks of the Liao State, the Northern Song Dynasty, the Jin State, and even the Mongols, a generation of Tianjiao Genghis Khan, all died in the Western Xia, which can blow the Western Xia Kingdom for several lifetimes, and it is actually under the simplest tactics of the Northern Song Dynasty, it is going to be a kingdom, which not only surprised the Northern Song Dynasty, even if it is the Liao State, but also caused a huge shock.